5
308511
Service
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 4.
NOTE: The number in parentheses in the text corre-
spond to those on the Parts Drawings on pages 6
through 9.
Valve Replacement
Models 803350, 803351, 15T282, and 15T283
1.
Remove the screws that hold the left hand side-
plate (1) and the right hand sideplate (23) together.
Separate the two sideplates. Remove the as-
sembled parts from the inside of the gun.
2.
Press the trigger pin out of the valve body (14) and
remove the trigger (3).
3.
Clamp the valve body in a vise.
4.
Unscrew the plug (16), and the retaining nut (7)
from the valve body (14).
5.
Remove the washer (17), spring (18), ball (19),
o-ring (21), seat (20), rod (10), backup ring (8),
and o-ring (9) from the valve body.
6.
To install the new valve:
a.
Install the o-ring (21) on the seat (20). Grease
the o-ring. Push the seat (and o-ring) into the
valve body (14) from the back side. (The seat
must be installed with the chamfered seat
being put into the valve body facing the ball.)
b.
Drop the ball (19) into the valve body (on top
of the previously installed seat). Drop the
spring (18) on top of the ball.
c.
Install a new washer (17) on the plug (16).
Screw the plug into the valve body and tighten
securely.
d.
Install an o-ring (9) into the valve body and
backup ring (8) on the retaining nut (7).
Grease the o-ring. Grease the outside of the
rod (10) and install through the center of the
retaining nut. The rod must be installed with
the rounded end out toward the trigger.
e.
Screw the actuator nut into the valve body and
tighten securely.
7.
Reinstall the trigger.
8.
Reassemble the left hand sideplate and right hand
sideplate with the seven screws.
Valve Body Replacement
1.
Follow steps 1–5 under Valve Replacement.
2.
Remove the outlet (4) and inlet (13) from the valve
body (14). Remove the plug (15) from the valve
body.
3.
Install the plug (15) into the valve body using pipe
thread sealant on the threads. Tighten the plug
securely.
4.
Install an outlet (4) and inlet (13) into the valve
body using pipe thread sealant on the threads.
TIghten both securely.
5.
Follow steps 6–8 under Valve Replacement.
